Electrical Fundamentals: Electrostatic Voltages
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Questions and Answers

What is voltage a measure of?

  • The number of electrons in a wire
  • The force or pressure applied to electrons (correct)
  • The resistance in a circuit
  • The speed of electron flow

    • In which direction is the current flow generally understood to occur?

  • From negative to positive (correct)
  • It depends on the resistance in the wire
  • In a loop within the circuit
  • From positive to negative

    • What is the unit for the force that propels the electrons down the wire?

  • Volts (correct)
  • Amps
  • Ohms
  • Watts

    • How does doubling the voltage affect the current in a circuit?

    <p>It doubles the current</p> Signup and view all the answers

    How is potential denoted with reference to a point?

    <p>+100 V with reference to 0 V</p> Signup and view all the answers

    What is the purpose of the triboelectric series?

    <p>To rank materials based on their tendency to gain or lose electrons</p> Signup and view all the answers

    At 10% to 20% relative humidity, what is the electrostatic voltage when walking over a vinyl floor?

    <p>12 000</p> Signup and view all the answers

    According to the information provided, what can be predicted about the voltage levels when two materials close together in the triboelectric series are rubbed together?

    <p>They will produce less voltage</p> Signup and view all the answers

    Who first discovered and wrote about the relationship between attracting or repelling charged bodies?

    <p>Charles A. Coulomb</p> Signup and view all the answers

    What is the main impact of materials higher on the triboelectric series?

    <p>They become positively charged</p> Signup and view all the answers

    What is voltage a measure of between two bodies with different potentials?

    <p>The difference in potential between the two bodies</p> Signup and view all the answers

    When can the voltage between two bodies have a negative sign?

    <p>When the bodies have the same potential</p> Signup and view all the answers

    What is the voltage difference between two bodies called?

    <p>Potential difference (PD)</p> Signup and view all the answers

    How does doubling the resistance in a circuit affect the current?

    <p>Halves the current</p> Signup and view all the answers

    What is resistance directly proportional to?

    <p>The length of any conductor</p> Signup and view all the answers

    What will an uncharged pith ball be attracted to?

    <p>A positively charged rod</p> Signup and view all the answers

    What happens when a rod with an excess of electrons is negatively charged?

    <p>The pith ball becomes positively charged and is attracted to the rod</p> Signup and view all the answers

    What happens when both the rod and the pith ball exhibit like electrostatic charges?

    <p>They repel each other</p> Signup and view all the answers

    What type of material is rubber in terms of electricity?

    <p>Insulator</p> Signup and view all the answers

    What happens when one part of a balloon is rubbed with wool?

    <p>The balloon becomes positively charged</p> Signup and view all the answers

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